CP2101 (2102) Characteristics and Application

CP2101 (CP2102) is the American Silicon Products, is a highly integrated USB to UART functionality and minimal PCB space can provide a simple solution to a dedicated chip, CP2101 includes USB2.0 full-speed function controller, USB transceiver, clock, EEPROM and asynchronous serial data bus (UART) Full signal demodulation control, no external USB devices, package size is 5x5mm MLP-28.
Applications:
· Widely used RS232 to USB.
· Cellular Phone USB interface cable
· PDA USB interface cable
· USB to RS232 serial device suitable to accompany.
Virtual Serial Port Driver
· The existing serial applications.
· WINDOWS98/2000/XP operating system
· MAC OS-9
· WINDOWS CE.
· Linux 2.4.
CP2101 without an external clock oscillator, the external circuit is very simple, the manufacturer provides free of charge for Windows (including Windows CE), Linux, Mac OS-X and other operating system drivers, users do not need the device for secondary development , only installed the hardware and install drivers to use, CP2101 serial bus data format: 8 data bits, 1 stop bit, parity selectable no parity, odd parity, even the school experience supports the standard baud rates: 300,600,1200,1800,2400,4800,7200,9600,14400,19200,28800,38400,460800.921600 and so on.
Below is a USB-RS232 converter circuit, and we explain its principles are as follows:
CP2101-9 feet and 6 feet VDD so that there is a 4.7kR resistance, (R1), which is to increase the anti-jamming features and added, in order to reduce system power of resistance, the first 6 feet of indirectly VDD and ground filter capacitor 4.7uF (C3), capacitors C1, C2 is the stability of data transmission in order to enhance signal transmission to avoid interference of the word. CP2101 chip, while the bottom has large pieces of metal grounding piece, the goal is to shield interference with other data sources signal interference.

USB-RS232 converter circuit

Driver Installation:
Windows98, WIndows2000 or Windows XP operating system, double-click CP2101x_VCP_Win2k_XP_S2k3.exe the executable file, you can enter the installation section, step by step, until the installation is complete. The driver installation is complete, check the USB adapter into the computer USB port, right single Click “My Computer” – “Properties” – “Hardware” – “Device Manager” – “port (LPT and COM)”, if you can see “CP210x USB to UART Broge Controller (COMx)” Information, the computer has found the device, to achieve a virtual serial port 3 (COM3), we can also modify some of the tools the default COM3 to COM port number, for example, the programmer default port number is COM1, right-click “CP210x USB to UART Brige Controller (COM3) “in the” Properties “-” Port Settings “-” Advanced “-” COM Port “box, select COM1, re-View Ports (COM & LPT) to see the success has been modified, after the Use this converter, the default port is COM1.